The block puzzle where wood turns, steel won’t budge, glass flips and molten glass melts everything in its path.

For iPhone and Android

A Short Stack game in progress: an 8 by 8 walnut board with wood, steel, glass, ice and molten glass blocks

Five materials. Five sets of rules.

Drag pieces onto the board and fill a row or column to clear it. What each block does along the way is up to its material.

  • Wood

    Rotates

    The everyday block. Tap a piece to turn it 90° before you place it.

  • Steel

    Static

    It can’t be turned, so plan around it. A line of all steel raises a giant shield before it falls.

  • Glass

    Flips

    Tap to flip it to its mirror image. A line of all glass fuses into one pane and shatters.

  • Molten Glass

    Rotates

    It shows up after big combos, or every 25 pieces you place. Its whole row and column melt away, full or not.

  • Ice

    Flips

    Unlocks after level 12. It freezes the blocks it touches, corners too, and the blocks touching those. An empty gap stops the cold.

Levels when you want a goal. Endless when you don’t.

  • Levels

    Hit each level’s goal in as few moves as you can to earn up to three stars, and finish fast for a Speed Bonus. Every fifth level from 10 is a Hard level, and the levels never end.

  • Endless Mode

    No goal and no finish line, just your best score. Play Standard, or All Rotate, where every block turns. Unlocks at level 10.

  • Daily Challenge

    A fresh puzzle every day with its own goal. Clear it for a Daily Chest, and keep your streak going for a bigger Streak Chest every 7th day. Unlocks at level 8.

343 Styles to collect.

Wood, Metal and Glass blocks, Game Boards, Block Docks and Backgrounds, plus 28 Music Tracks. Earn them as you play, find them in Chests, and buy more Chests with the coins you collect, including a Daily Coin Drop when you play days in a row.

Short Stack with a lantern-lit night Background, a black marble Game Board and Ebony, Amethyst and Gold block Styles

VIP

All 343 Styles and 28 Music Tracks, including 49 animated Styles and 4 Music Tracks you’ll only find in VIP.

  • Animated Wood, Metal and Glass blocks, Game Boards and Block Docks, eight of each, plus nine animated Backgrounds
  • Four heavy Music Tracks: Neon Rampage, Bass Beast, Iron Jaw and Apex Predator
  • Every new Style and Music Track in future updates

Limited-time items aren’t included. Some VIP Styles move or flash; Still Effects in Account › Options holds them still.

See every material type in action.

A quick look at how wood, steel, glass, molten glass and ice play.

How it plays

One material type at a time. Tap a step to jump to it.